51. Nitrate and selected pesticides in ground water of the Mid-Atlantic region Author/Creator: Ator, Scott W., author Publication/Creation: Baltimore, Maryland : United States Geological Survey, 1997 Resource Type: Book Access & Availability: Loading
52. Nitrate and pesticides in surficial aquifers and trophic state and phosphorus sources for selected lakes, eastern Otter Tail County, west-central Minnesota, 1993-96 Author/Creator: Ruhl, J. F., author Publication/Creation: Mounds View, Minnesota : U.S. Geological Survey, 1997 Resource Type: Book Access & Availability: Loading
53. Nitrate and pesticides in ground water of the eastern San Joaquin Valley, California : occurrence and trends Author/Creator: Burow, Karen R., author Publication/Creation: Sacramento, California : U.S. Geological Survey, 1998 Resource Type: Book Access & Availability: Loading
54. Nitrate and other water-quality characteristics, and nitrogen in the unsaturated zone, in the Red Willow and Hitchcock counties special protection area, southwest Nebraska, 1993-95 Author/Creator: Steele, G. V., author Publication/Creation: Lincoln, Nebraska : U.S. Geological Survey, 1998 Resource Type: Book Access & Availability: Loading
55. A new cation-exchange method for accurate field speciation of hexavalent chromium Author/Creator: Ball, J. W. Publication/Creation: Boulder, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 2003 Resource Type: Book Access & Availability: Loading
56. Near-real-time simulation and internet-based delivery of forecast-flood inundation maps using two-dimensional hydraulic modeling : a pilot study of the Snoqualmie River, Washington Author/Creator: Jones, Joseph L., 1958- Publication/Creation: Tacoma, Wash. : U.S. Dept. of the Interior, U.S. Geological Survey, 2002 Resource Type: Book Access & Availability: Loading
57. Natural radioactivity in, and inorganic chemistry of, ground water in the Kirkwood-Cohansey aquifer system, southern New Jersey, 1983-89 Author/Creator: Kozinski, Jane, author Publication/Creation: West Trenton, New Jersey : U.S. Geological Survey, 1995 Resource Type: Book Access & Availability: Loading
58. Natural flow and water consumption in the Milk River basin, Montana and Alberta, Canada Author/Creator: Thompson, R. E. (Ronald E.), author Publication/Creation: [Helena, Mont.] : U.S. Geological Survey, [1986?] Resource Type: Book Access & Availability: Loading
59. Natural attenuation of chlorinated volatile organic compounds in ground water at Operable Unit 1, Naval Undersea Warfare Center, Division Keyport, Washington Publication/Creation: Tacoma, Wash. : U.S. Dept. of the Interior, U.S. Geological Survey, 2002 Resource Type: Book Access & Availability: Loading
60. Natural attenuation of chlorinated volatile organic compounds in a freshwater tidal wetland, Aberdeen Proving Ground, Maryland Author/Creator: Lorah, Michelle M., author Publication/Creation: Baltimore, Maryland : U.S. Geological Survey, 1997 Resource Type: Book Access & Availability: Loading